Relations between Russia and Britain have deteriorated to what Moscow describes as an unprecedented low, with warnings that British involvement in Ukrainian long-range strikes could increasingly be regarded as participation in the war. Yet despite increasingly hostile rhetoric, the evidence presented suggests both sides still have powerful reasons to avoid the step that could turn confrontation into a direct Russia-NATO conflict.
INR Report: Based on reporting by RT, published 24 August 2026 HERE.
Russia's ambassador to Britain, Andrey Kelin, left his post in late July and Moscow has not immediately appointed a replacement — an unusual diplomatic development at a time when relations between the two nuclear-armed states have fallen to their lowest point in decades.
The Russian Embassy in London described relations as being at an “unprecedentedly low level”, saying Kelin had attempted to preserve diplomatic contacts but that Britain had instead chosen what Moscow characterised as a “path of confrontation.”
The development does not in itself mean Russia and Britain are preparing for war. Indeed, RT's analysis argues that Moscow's decision is more likely an acknowledgement of the collapse in bilateral relations than preparation for military action. Previous crises — including the Litvinenko and Skripal cases — resulted in reciprocal diplomatic expulsions rather than the effective downgrading now taking place.
Britain Moves Deeper Into the Ukraine Conflict
Britain has been among Ukraine's strongest military supporters since Russia's invasion in February 2022. London has supplied weapons including Storm Shadow long-range cruise missiles, while British-made systems and technology have increasingly become part of Ukraine's ability to strike targets at greater distances.
According to the RT report, Moscow now argues that British involvement is moving beyond simply supplying weapons.
Russian Foreign Minister Sergey Lavrov has warned that direct British military involvement in strikes against Russia could be regarded by Moscow as participation in the war. The Russian Embassy has similarly warned that the deeper Britain's involvement becomes, the greater the consequences could be.
British Prime Minister Andy Burnham, meanwhile, has pledged continued support for Ukraine. RT reports that his government has announced plans to provide classified information intended to assist Ukraine in producing Storm Shadow cruise missiles domestically. During a subsequent visit to Kiev, Burnham also pledged additional air-defence missiles.
That distinction matters.
Supplying Ukraine with weapons is one level of involvement. Providing targeting assistance, classified technical information or operational support potentially moves Britain closer to the difficult legal and strategic question of when a weapons supplier becomes an active participant in hostilities.
Moscow Signals Where It May Respond
For now, Russia's stated response remains focused on Ukraine rather than Britain itself.
Kremlin spokesman Dmitry Peskov said Russian forces were gathering information to identify production facilities associated with missiles and other military equipment and would take measures to destroy them.
That suggests Moscow's immediate military response to expanded British assistance would be attacks against weapons-production infrastructure inside Ukraine.
The larger danger arises if Russia concludes that attacks on Russian territory are being planned, enabled or directly conducted by British military personnel.
That is the threshold around which much of Moscow's increasingly explicit rhetoric is now centred.
How Far Can Britain Go?
There are also practical limits to Britain's ability to escalate.
RT argues that Britain's military capacity has been weakened by decades of reduced defence spending and that its ability to sustain a large conventional conflict would be severely constrained. It also points to diminishing Western air-defence inventories and the difficulty of continually supplying Ukraine with sophisticated missile systems. These assessments are claims within RT's analysis and should not be treated as independently established by this report.
But the much larger constraint is nuclear deterrence.
Britain is a NATO member and nuclear weapons state. Russia is also a nuclear power. Direct British military intervention against Russian forces therefore carries consequences far beyond the battlefield in Ukraine.
The RT analysis argues that overt British intervention could potentially escalate into a Russia-NATO conflict — precisely the scenario Western governments have attempted to avoid since 2022.
Calls for Military-to-Military Dialogue
Significantly, there are indications that figures within Britain's own defence establishment recognise the danger.
RT reports that former British Chief of the Defence Staff Tony Radakin and his successor Richard Knighton have sought contact with Russian Chief of the General Staff Valery Gerasimov in an effort to reduce the possibility of naval escalation.
Former defence chief Field Marshal Lord David Richards has also advocated negotiations with Russia, while former British defence attaché John Foreman has argued that Britain should reopen strategic dialogue with Moscow.
Those contacts may ultimately prove more important than the public rhetoric.
During the Cold War, communication between adversaries was regarded as essential precisely because the consequences of misunderstanding between nuclear powers were so severe. Closing diplomatic and military channels removes one of the mechanisms designed to prevent an incident, miscalculation or misunderstanding from becoming something much larger.
Are Russia and Britain Actually Close to War?
Not necessarily.
Russia's failure to immediately replace its ambassador is a serious diplomatic signal, but it is not equivalent to severing diplomatic relations, mobilising forces against Britain or declaring hostilities.
The greater concern is the trajectory.
Britain is providing increasingly sophisticated military assistance to Ukraine. Russia is warning that certain forms of British participation could cross the line into direct involvement. At the same time, diplomatic channels between London and Moscow have weakened.
Each development by itself may be manageable.
Together, they reduce the margin for error.
Does This Affect New Zealand?
Yes — although New Zealand's position is fundamentally different from Britain's.
New Zealand is not a member of NATO and is not covered by NATO's Article 5 collective-defence guarantee. However, New Zealand is a member of the Five Eyes intelligence partnership alongside Britain, the United States, Canada and Australia, and has provided military training and other assistance to Ukraine.
A direct military confrontation between Britain and Russia would therefore have consequences extending well beyond Europe.
For New Zealand, the immediate effects would most likely be diplomatic and economic rather than military: disruption to global energy markets, financial markets, shipping, trade and potentially food and fertiliser prices.
But a wider Russia-NATO confrontation would create considerably more difficult questions about New Zealand's relationship with its traditional security partners.
The critical issue is therefore not whether Britain and Russia are at war today.
They are not.
It is whether continued escalation gradually erodes the distinction between supporting a combatant and becoming one — and whether enough diplomatic communication remains to prevent either side from discovering where that line lies only after it has been crossed.
Independent reporting. Original context. Credited sources.
Source
RT — How close are Russia and the UK to war? — Published 24 August 2026.